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Q)
In quantitative analysis of second group in lab.
H
2
S
gas is passed in acidic medium for ppt. When
C
u
+
2
and
C
d
+
2
react with KCN, than in which of the following condition, ppt will not be formed due to relative stability :
( A )
K
3
[
C
u
(
C
N
)
4
]
– More stable
K
2
[
C
d
(
C
N
)
4
]
– Less stable
( B )
K
3
[
C
u
(
C
N
)
4
]
– Less stable
K
3
[
C
d
(
C
N
)
4
]
– More stable
( C )
K
2
[
C
u
(
C
N
)
4
]
– Less stable
K
2
[
C
d
(
C
N
)
4
]
– More stable
( D )
K
2
[
C
u
(
C
N
)
4
]
– More stable
K
2
[
C
d
(
C
N
)
4
]
– Less stable
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